The oxy.IQ's oxygen sensor is an advanced galvanic fuel cell that provides superior performance, accuracy, stability and long life. The cell's innovative design eliminates the potential for negative signal output, reduces sources of contamination. The cell is unaffected by other background gases or hydrocarbons and some models are compatible with acid gases. Recovery from air at low ppm levels takes just a few minutes. Because the cell is self-contained, minimal maintenance is required. There is no electrolyte to change or electrodes to clean.